Key Facts

  • Classified as a Jupiter Trojan
  • Comparable in size to the U.S. state of Delaware (101.09 km diameter)
  • Not a Near Earth Asteroid (NEA)
  • Not a Potentially Hazardous Asteroid (PHA)
  • See orbit simulation

Overview

Priamus is a average-sized asteroid that shares Jupiter's orbit around the sun. NASA JPL has not classified Priamus as potentially hazardous because its orbit does not bring it close to Earth.

Priamus orbits the sun every 4,308 days (11.80 years), coming as close as 4.55 AU and reaching as far as 5.82 AU from the sun. Priamus is about 101.1 kilometers in diameter, making it larger than most asteroids, comparable in size to the U.S. state of Delaware.

The rotation of Priamus has been observed. It completes a rotation on its axis every 6.86 days.

Priamus's spectral type D (Tholen) / (SMASSII) indicates that it is likely to contain water.

No Close Approaches

Priamus's orbit is 3.53 AU from Earth's orbit at its closest point. This means that there is an extremely wide berth between this asteroid and Earth at all times.

Orbital simulations conducted by NASA JPL's CNEOS do not show any close approaches to Earth.

Images and Observations

Priamus's orbit is determined by observations dating back to Nov. 8, 1917. It was last officially observed on May 11, 2019. The IAU Minor Planet Center records 2,312 observations used to determine its orbit.

Accessibility and Exploration

This asteroid is not considered a viable target for human exploration by the NHATS study.

Similar Objects

These objects have orbits that share similar characteristics to the orbit of Priamus:

References

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Orbital Elements

  • Epoch: 2458600.5 JD
  • Semi-major axis: 5.18175770221 AU
  • Eccentricity: 0.122676266934
  • Inclination: 8.91537649483°
  • Longitude of Ascending Node: 301.562954226°
  • Argument of Periapsis: 335.474152745°
  • Mean Anomaly: 291.306140128°

Physical Characteristics

  • Diameter: 101.09300 km
  • Magnitude: 8.81
  • Albedo: 0.044
  • Spectral type (Tholen): D

Derived Characteristics

  • Orbit Period: 4,308 days (11.80 years)
  • Avg. Orbit Speed: 13.08 km/s
  • Aphelion Distance: 5.82 AU
  • Perihelion Distance: 4.55 AU
  • Rotation Period: 6.86 days
  • Approx. Composition: water.

Size Comparison

Orbit Simulation

Sky Map

The position of Priamus is indicated by a ◯ pink circle. Note that the object may not be in your current field of view. Use the controls below to adjust position, location, and time.